3 Replace the sensor protection cap.
1 Press the ON/OFF button to switch the meter off.
Note: If the meter is to remain unused for a long period of time, use pure water instead of tap water to wash the sensor.
2 Wash the sensor with tap water and wipe away any residual water using a clean tissue.
A7: AFTER MEASUREMENT
A8: CARE AND MAINTENANCE
Ÿ If the measuring surface of the sensor is contaminated or if air bubbles are regularly present in the
sample, clean the sensor using a diluted neutral detergent (diluted 100 times).
Ÿ Always store the components of the Elcometer 138 Bresle Salt Kits in the carrying case when the kit
is not being used.
Ÿ The Elcometer 138 Meters incorporate a Liquid Crystal Display. If the display is heated
above 50°C (120°F) it may be damaged. This can happen if the meter is left in a car parked in
strong sunlight.
The Elcometer 138 Meters are designed to give many years reliable service under normal operating
conditions.
Ÿ Prolonged periods of non-use may cause the sensor to dry out. This can result in malfunction or
unstable readings. Pour conditioning solution into the sensor cell and leave for a few minutes to
allow the sensor to become saturated. Wash the sensor with water prior to use.
The Elcometer 138 Meters do not contain any user-serviceable components. In the unlikely event of a
fault, the meter should be returned to your local Elcometer supplier or directly to Elcometer Limited -
contact details can be found on our website, www.elcometer.com. The warranty will be invalidated if the
meter has been opened.
R
en-21 www.elcometer.com
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